fix version string in spec file
fix source file extension in spec file
Document image uploads to SUSE Cloud

Documentation is based on Studio Blog 'Importing images into
SUSE Cloud / OpenStack'

http://blog.susestudio.com/2012/10/importing-images-into-suse-cloud.html
(cherry picked from commit 822df88de37b992d1267c59c6e06e53526f56936)
Make the SUSE cloud link appear on http://susestudio.com/help/use/index.html
(cherry picked from commit fa9b681f173a9455e74564704880e334e35c179b)